| http://www.w3.org/ns/prov#value | - Bronchial tube are highly sensitive - in response to variety of stimuli such as cold weather, infection, exercise, allergies, and emotional stress, they fill with mucus and contract, leading to coughing, wheezing, and serious breathing difficulties ??? ??? ??? Rough and tumble play friendly chasing and play-fighting ??? ??? ??? Concrete Operational Stage 7-11 years and marks a major turning point
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